To encourage communication between parents and to prevent children from having extremely large monthly bills due to additional minute charges,...

To encourage communication between parents and to prevent children from having extremely large monthly bills due to additional minute charges, two cell phone companies are offering special service plans for students.

Talk fast cellular phone services charges $0.10 for each minute the phone is used.Talk easy cellular phone charges a basic monthly fee of $18 plus $0.04 for each minute the phone is used.

Your parents are willing to purchase for you one of the cellular phone service plans listed above. However, to help you become fiscally responsible they ask you to use the following questions to analyze the plans before choosing one. How much would each company charge per month if you talked on the phone for 100 minutes in a month? How much if you talked for 200 minutes in a month?